src/main/kotlin/net/pterodactylus/sone/template/HistogramRenderer.kt

   1 package net.pterodactylus.sone.template
   2
   3 import com.codahale.metrics.*
   4 import net.pterodactylus.sone.utils.*
   5 import net.pterodactylus.util.template.*
   6
   7 /**
   8  * [Filter] that renders a [Histogram] as a table row.
   9  */
  10 class HistogramRenderer : Filter {
  11
  12         override fun format(templateContext: TemplateContext, data: Any?, parameters: Map<String, Any?>?): Any? {
  13                 templateContext["metricName"] = (parameters?.get("name") as String?)?.dotToCamel()?.let { "Page.Metrics.$it.Title" }
  14                 (data as? Histogram)?.snapshot?.run {
  15                         templateContext["count"] = data.count
  16                         templateContext["min"] = min
  17                         templateContext["max"] = max
  18                         templateContext["mean"] = mean
  19                         templateContext["median"] = median
  20                         templateContext["percentile75"] = get75thPercentile()
  21                         templateContext["percentile95"] = get95thPercentile()
  22                         templateContext["percentile98"] = get98thPercentile()
  23                         templateContext["percentile99"] = get99thPercentile()
  24                         templateContext["percentile999"] = get999thPercentile()
  25                 }
  26                 return template.render(templateContext)
  27         }
  28
  29 }
  30
  31 private val template = """<tr>
  32         <td><% metricName|l10n|html></td>
  33         <td class="numeric"><% count|html></td>
  34         <td class="numeric"><% min|duration scale=='μs'|html></td>
  35         <td class="numeric"><% max|duration scale=='μs'|html></td>
  36         <td class="numeric"><% mean|duration scale=='μs'|html></td>
  37         <td class="numeric"><% median|duration scale=='μs'|html></td>
  38         <td class="numeric"><% percentile75|duration scale=='μs'|html></td>
  39         <td class="numeric"><% percentile95|duration scale=='μs'|html></td>
  40         <td class="numeric"><% percentile98|duration scale=='μs'|html></td>
  41         <td class="numeric"><% percentile99|duration scale=='μs'|html></td>
  42         <td class="numeric"><% percentile999|duration scale=='μs'|html></td>
  43 </tr>""".asTemplate()
  44
  45 private fun String.dotToCamel() =
  46                 split(".").joinToString("", transform = String::capitalize)